ODN s optical cables can be divided into

ODN optical cables are typically divided into four main segments: feeder, distribution, drop, and premises/home cables.

Main ODN Cable Segments

1. Feeder Cable (Backbone)
   • Connects the central office or OLT to the main distribution points or cabinets.
   • Usually high-capacity metropolitan area cables such as GYTA53 or GYTS armored cables, suitable for direct burial or pipeline installation.
   • Supports long-distance transmission and carries multiple optical fibers to serve large areas .
2. Distribution Cable (Wiring/Distribution)
   • Extends from the backbone cabinets to secondary distribution points or neighborhood cabinets.
   • Often multi-core fiber cables designed for flexibility and scalability.
   • Can be installed in ducts, conduits, or aerially on poles, and may use standard single-mode fibers like G.652 or bending-insensitive fibers like G.657A .
3. Drop Cable (Introduction/Access)
   • Connects the distribution point directly to the subscriber's premises.
   • Typically uses small-diameter, flexible, and bending-insensitive fibers (G.657A) to facilitate easy routing through corridors, walls, or aerial paths.
   • Can be single-core or dual-core, and may include armored or pre-terminated options for special environments .
4. Premises/Home Cable (Terminal Segment)
   • The final segment inside the home or building, connecting to the Optical Network Terminal (ONT) or Optical Network Unit (ONU).
   • Often pre-connectorized or patch cords for easy installation.
   • Ensures minimal signal loss and maintains the integrity of the optical link to end-user devices .

Additional Considerations

• Splitters and Routing: Optical splitters (1:4, 1:8, 1:16, 1:32, 1:64) are used in the distribution network to divide signals among multiple subscribers .
• Standards Compliance: All cables and components must meet IEC 61300 requirements for low insertion loss, stable return loss, and mechanical durability .
• Topology Variations: ODN can adopt centralized, distributed, or cascaded splitting topologies depending on urban density and deployment scenarios . In summary, ODN optical cables are systematically divided into feeder, distribution, drop, and premises/home segments, each optimized for distance, capacity, and installation environment, ensuring efficient and reliable fiber-to-the-home (FTTH) or fiber-to-the-building (FTTB) deployments .